Capitalism is what enables that very authoritarianism.

When the proletariat and bourgeoise start becoming dissatisfied, distract with a fabricated crisis and blame another group, splitting them apart. --> oligarchy furthers and the bourgeoise and proletariat are further impoverished. This goes together with an increasingly large police apparatus and surveillance capitalism.

Two main outcomes arise:

Either the bourgeoise takes matters in their own hands, supported by the oligarchy; and fascism arises. The oligarchy supports this, as it allows themselves to concentrate the proletariat into trade unions fully appointed by them.

Or, the proletariat takes matters into their hands, and liberate themselves from the chains of capitalism and fascism. But the capitalist oligarchy, again, might attempt to subvert that revolution, by supporting conservative and authoritarian elements for propaganda purposes; they will back oil, coal, and gas industries, rather than renewables, as the former ones are often headed or governed by pro-fascist leaders.

But the red path between brown fascism and gold greed, that narrow path of communism and socialism, is the path of liberation; the path in where the proletariat liberates itself from both fascism and capitalism, and defeats authoritarianism. The Rojava, the Zapatista, the Makhnovishna, Frisian freedom, and Free Catalonia, have shown us that such a path is very much possible.